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Discussion Starter · #1 ·
Hi I have a 2004 ltz400 and was putting a new top end on it(it did sit for a few months in the shop) I can have it idol just fine but as soon as I push the throttle it will pop sputter bang and will almost kill itself. I double checked the timing and it’s good. I am completely lost right now. Any ideas would be greatly appreciated thanks!!
 

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Poor off idle can be caused be lean Pilot circuit. First try to turn out the fuel screw, up to 3 turns from lightly seated. See if that fixes it.
 
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